gesso gessamine • gest · · · Info · Definitions · Characters · · gesso · · Text Latin · · Script 5 · · Length Definitions · · · (noun) gypsum or plaster of Paris spread on a surface to make it suitable for painting or gilding (or a surface so prepared). · · Noun Definition 1 Characters · · e latin small letter e U+0065 g latin small letter g U+0067 o latin small letter o U+006F s latin small letter s U+0073